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Jan. 16, 1923.

' FILED APR-9,1921- Q 1 I 1 x Wmm .LWWWMU 1/7/ 911 for.

Patented Jan. 16, 1923.

UNITED STATES PATENT orrica.

GEORGE I. IDORRIS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO DORRIS MOTOR GAR COMPANY, OF ST. LOUIS, MISSOURI, A COBPORATIQN OF MISSOURI.

INTERNAL-COMBUSTION ENGINE.

Application filed April 9,

To all whom it may concern:

Be it known that I, Gnonen I. Dennis, a citizen of the United States, residing at St. Louis, Missouri, have invented a new and useful Internal Combustion Engine, of which the following is a specification.

This invention relates to internal combustion engines.

An object of the invention is to provide improved means for assuring vaporization ofthe heavy ends of the gasoline that passes the carburetor before such heavy ends enter the cylinders of the engine.

Another object of the invention is to pro vide improved means for utilizing the heat of the exhaust of an internal combustion engine for vaporizing the heavy ends of gasoline between the carburetor and the engine cylinders, and preventing such heavy ends from entering the cylinders in unvaporized form. i

The drawing illustrated an appropriate embodiment of the invention.

In the construction shown the intake manifold 1 has upwardly extending branches 2 opening into the respective cylinders of the engine. The exhaust manifold 3 has communication 4 with the exhaust ports of the engine, and also opens into an exhaust pipe 5 for discharging the heated exhaust.

The heavy ends or unvaporized portions of the gasoline that pass the carburetor and enter the intake manifold 1 are heated and vaporized by the heat of the engine, so that the heavy ends of the gasoline are prevented from entering the engine cylinders in unvaporized form. In using the term heavy ends in this and in my companion applications Serial Nos. 458,299 and 459,915, I have reference to the unvaporized gasoline. As stated the heavy ends of thegasoline that pass the carburetor and enter the intake manifold are vaporized before entering the cylinders. After such heavy ends have been vaporized they are returned in vaporized form into the intake manifold and are drawn from the intake manifold, into the engine.

In the embodiment shown the heavy ends of the gasoline that pass the carburetor are delivered into a heater that is heated by the heated exhaust. The heavy ends of the gasoline are vaporized by the heat and returned, in vaporized form, to the intake manifold.

1921. Serial No. 459,916.

The heater mentioned may be of any appropriate form and, as shown, comprises a pipe 6 wound or coiled around the exhaust pipe 5 below the intake manifold and having an extended portion 7 opening into the intake manifold in order to deliver the vaporized heavy ends into the intake manifold.

The heater 6 is arranged to receive the heavy ends of the gasoline from the intake manifold. A pipe 8 is shown in connection with the lower end of the heater 6 opening into one or more receptacles 9 that open into the intake manifold and receive the heavy ends of the gasoline therefrom. The pipe 8 opens into a pipe 10 leading to the gasoline tank or other suitable place of discharge. This pipe 10 is provided with a valve 11 that is arranged and designed to prevent gasoline from being drawn from the gasoline tank to the engine when the engine is running; but when the engine is stopped the valve will open under pressure of the gasoline in the pipe 8 and other pressure between the valve and the engine, to permit the gasoline to pass the valve and discharge at the place desired. The pipe 10 will, of course, open into the gasoline tank above the level of the gasoline therein.

By this construction it is apparent that the heavy ends of the gasoline in the intake manifold 1 will pass into the receptacles 9 and thence through the pipe 8 to the heater 6. The gasoline is vaporized by the heat and is discharged in vaporized form through the extended portion 7 of the heater into tl e manifold above the plane of the openings from the manifold into the receptacles 9.

Both ends oft ie trapped gasoline are subjeeted to the same degree of pressure, due to the fact that both ends are in communication with the intake manifold.

It is apparentthat the invention may be embodied in different forms without depar ture from the principle thereof. The heater may be arranged otherwise than as shown and the construction and arrangement may be varied in other particulars. The device prevents the heavy ends and unvaporized portions of gasoline from entering the en gine cylinders, thus prolonging the life of the engine and preventing imperfect combustion resulting from the flooding of the Forum engine with unvaporized gasoline.

cylinders is reduced to a minimum.

it is obvious that the invention satisfactorily accomplishes all of its intended purposes in a highly efficient manner.

What I claim and desireto secure by Letters Patent, is

l. T he combination with an internal combustion engine, the intake manifold thereof having an inlet opening for receiving and havingln'anches opening into the respective cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a number of pipes independent of the inlet to the intake manifold for conducting the heavy ends of the gasoline out of the intake manifold, a heater receiving the heavy ends of the gasoline from said pipes and rranged to be heated by the exhaust pipe for heating and vaporizing the heavy ends of the gasoline that are conducted out of the intake manifold, and a pipe supported outside of the manifold for conducting the vaporized gasoline from said heater into the intake manifold.

2. T he combination with an internal. combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a pipe separate from the gas inlet to the intake manifold for conducting the heavy ends of the gasoline from the intake manifold, a device forming a communication from the intake manifold to said pipe, a heater arranged to receive the heavy ends of the gasoline from said pipe and to be heated by the heated exhaust. and a pipe outside of the manifold for conducting the vaporized gasoline from said heater into the intake manifold.

3. The combination with an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinder of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a pipe outside of the mani fold having one end communicating with the intake manifold at one point and arranged to receive tlieheavyends of gasoline from the intake manifold and having its other end opening into the intake manifold at another point todeliver vaporized gasoline to the intake manifold, and having a. partof its intermediate portion arranged to be heated by the exhaust of the engine to vaporize the gasoline contained therein.

1;. The combination with an internal COH1- bastion engine, the intake manifold thero of arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a pipe having one and communicating with the intake manifold at one point and arrangei'l to receive. the heavy ends of soline from the intake manifold and having its other end opening into the intake manifold at another point to deliver vaporized gasoline to the intake manifold, and having a part of its interme diate portion coiled around the exhaust pipe and subjected to the heat thereof to vaporize the heavy ends of the gasoline contained therein.

5. The combination with an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a pipe separate from the gas. inlet to the intake manifold for conducting the heavy ends of the gasoline from the intake manifold, a heater arranged to receive the heavy ends of the gasoline from said pipe and to be heated by the heat ed exhaust, a pipe for conducting the vaporized gasoline from said heater into the intake manifold, and a pipe for conducting the heavy ends of the gasoline away from the heater to a point of discharge outside 'of the intake manifold.

6. The combination with an internal combustion engine, the intake manifold thereof having an inlet opening for receiving gas and having branches opening into the respective cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of means independent of the inlet to the intake manifold for 0011- ducting the heavy ends of the gasoline out of the intake manifold, a heater arranged to be heated by the exhaust pipe for heating and vaporizing the heavy ends of the gasoline that are conducted out of the intake manifold, a pipe for conducting the vaporized gasoline from said heater into the intake manifold, and a pipe for conducting the heavy ends of the gasoline away from the heater to a point of discharge outside the intake manifold.

7. The combination with an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinder of the engine, and an exhaust pipe for conducting the heated exhaust from th engine, of a pipe having one end communicating with the intake manifold and arranged to receive the heavy ends of gasoline from the intake manifold. and having its other end opening into the intake manifold. to deliver vaporized gasoline to the intake manifold and having a part of its intermediate portion'arranged to be heated by the ex haust of the engine to vaporize the gasoline contained therein, and a pipe for conducting a part of the heavy ends ofthe gasoline to a point of discharge.

8. The combination with an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a pipe having one end communicating With the intake manifold and arranged to receive the heavy ends of gasoline from the intake manifold and having its other end opening into the intake manifold to deliver vaporized gasoline to the intake manifold, and having a part of itsintermediate portion coiled around the exhaust pipe and subjected to the heat thereof to vaporize the heavy ends of the gasoline contained therein, and a pipe for conducting a part of the heavy ends of the gasoline to a point of discharge.

9. The combination With an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pipe for conducting the heated exhaust from the engine, of a receptacle outside of the manifold arranged to receive the heavy ends of the gasoline from the intake manifold independently of the gas inlet to the intake manifold, a pipe outside of the manifold having one end opening intosaid receptacle and its opposite end opening into the intake manifold, and having an intermediate portion subjected to the heat of the exhaust pipe and arranged to receive the heavy ends of the gasoline from said receptacle.

10. The combination With an internal combustion engine, the intake manifold thereof arranged to receive gas for distribution to the cylinders of the engine, and an exhaust pip for conducting the heated exhaust from the engine, of a receptacle arranged to receive the heavy ends of the gasoline from the intake manifold independently of the gas inlet to the intake manifold, a pipe having one end opening into said receptacle and its opposite end opening into the intake manifold and having an intermediate portion subjected to the heat of the exhaust pipe and arranged to receive the heavy ends of the gasoline from said receptacle, and a pipe branching from said first-named pipe for conducting the heavy ends of the gasoline to a point of discharge outside the intake manifold.

GEORGE P. DORRIS. 

